October 2021 - ChimeraX-users - RBVI Mailing Lists

Unit cell box
by Diego Sebastian Ferrero 28 Oct '21

28 Oct '21

Dear all, I am trying to make a figure using ChimeraX to show the contents of the unit cell in one protein structure. I would like to show the cell box with the asymmetric unit (similar to that box obtained in chimera using “Tools>Higher Order Structure>Crystal Contacts” ) but ChimeraX apparently doesn’t recognize the command returning the following message in the log window: unitcell outline Unknown command: unitcell What I’m doing wrong? Is it the right command to show the box? Thanks in advance, Diego

2 2

ChimeraX bug report submission
by Samuel Haysom 27 Oct '21

27 Oct '21

i want to show just the CA atoms of a selection of residues (starting with the rest of the model shown as a cartoon). To do this I am trying to use a command like this: show #3/A:436,464,465,495,498,500,550,697,755,764,795,798,799@CA target a But this doesn't do anything. If I take off the @CA bit I can show all the atoms in the residue. Full .cxc is as follows: open 5ljo open 5d0o hide #1,2 atoms show #1,2/A cartoons color #1,2/A rgb(0.252,0.680,1.000) color #1,2/B rgb(0.000,0.831,0.321) color #1,2/C rgb(1.000,0.861,0.137) color #1,2/D rgb(1.000,0.400,0.100) color #1,2/E rgb(0.780,0.000,0.400) ### Align barrels ### # mmaker #2/A:435-810 to #1/A:435-810 view matrix model #1,1,0,0,0,0,1,0,0,0,0,1,0,#2,-0.82647,-0.51941,0.21716,224.85,-0.53861,0.61724,-0.57351,177.83,0.16385,-0.59096,-0.78989,191.81,#2.1,1,0,0,0,0,1,0,0,0,0,1,0 ### Color EPR regions ### color #1,2/A:424-447 green color #1,2/A:454-518 red color #1,2/A:348-423 dark orange ### Create Morph ### morph #1,2 frames 40 ### Show single mutant CA ### ### New positions ### show #3/A:436,464,465,495,498,500,550,697,755,764,795,798,799@CA target a color #3/A:436,464,465,495,498,500,550,697,755,764,795,798,799 magenta ### Existing Positions ### show #3/A:435,499,501,535,564,751,793 target a color#3/A:435,499,501,535,564,751,793 purple Log: Startup Messages --- note | available bundle cache has not been initialized yet UCSF ChimeraX version: 1.3.dev202110261153 (2021-10-26) © 2016-2021 Regents of the University of California. All rights reserved. How to cite UCSF ChimeraX > open 5ljo Summary of feedback from opening 5ljo fetched from pdb --- warnings | Atom H is not in the residue template for LEU /B:22 Atom H is not in the residue template for CYS /C:25 Atom H is not in the residue template for GLU /D:26 Atom H is not in the residue template for GLU /E:24 Atom H is not in the residue template for PHE /A:24 5ljo title: E. coli BAM complex (BamABCDE) by cryoEM [more info...] Chain information for 5ljo #1 --- Chain | Description | UniProt A | Outer membrane protein assembly factor BamA | BAMA_ECO45 B | Outer membrane protein assembly factor BamB | BAMB_ECOLI C | Outer membrane protein assembly factor BamC | BAMC_ECOLI D | Outer membrane protein assembly factor BamD | BAMD_ECO57 E | Outer membrane protein assembly factor BamE | BAME_ECOL6 > open 5d0o 5d0o title: BamABCDE complex, outer membrane β barrel assembly machinery entire complex [more info...] Chain information for 5d0o #2 --- Chain | Description | UniProt A | Outer membrane protein assembly factor BamA | BAMA_ECOLI B | Outer membrane protein assembly factor BamB | BAMB_ECOLI C | Outer membrane protein assembly factor BamC | BAMC_ECOLI D | Outer membrane protein assembly factor BamD | BAMD_ECOLI E | Outer membrane protein assembly factor BamE | BAME_ECOLI > hide #1,2 atoms > show #1,2/A cartoons > color #1,2/A rgb(0.252,0.680,1.000) > color #1,2/B rgb(0.000,0.831,0.321) > color #1,2/C rgb(1.000,0.861,0.137) > color #1,2/D rgb(1.000,0.400,0.100) > color #1,2/E rgb(0.780,0.000,0.400) > view matrix models > #1,1,0,0,0,0,1,0,0,0,0,1,0,#2,-0.82647,-0.51941,0.21716,224.85,-0.53861,0.61724,-0.57351,177.83,0.16385,-0.59096,-0.78989,191.81,#2.1,1,0,0,0,0,1,0,0,0,0,1,0 > color #1,2/A:424-447 green > color #1,2/A:454-518 red > color #1,2/A:348-423 dark orange > show #3/A:436,464,465,495,498,500,550,697,755,764,795,798,799@CA target a

2 1

clashes after mutagenesis
by tiger wang 27 Oct '21

27 Oct '21

Dear I am quite new to Chimera. I am using ChimeraX to do some mutagenesis in the protein with its 3D structure. After mutagenesis, the clashes were found. I tried to use tool torsion to adjust the atoms' angles and found when one clash was solved the other clashes came up. It seems it is a endless process. The question is how to correct the clashes due to mutagenesis, only manually adjust one by one using tool torsion or there is other ways to do in the same time simutaneously, such as using modeller inbeded in ChimeraX? Thanks very much for your help Sincerely Tiger Wang

2 2

Refine predicted structure by pulling
by Roden Deng Luo 26 Oct '21

26 Oct '21

Dear ChimeraX Users, There is this AlphaFold prediction: https://alphafold.ebi.ac.uk/entry/P02549. And we know this protein should be more or less in a rod-like shape rather than a globular shape: https://en.wikipedia.org/wiki/Spectrin and related literature such as https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3218374/. I wonder is there a way that we can pull the two ends of the predicted structure while maintaining the secondary structures, mostly alpha-helices in this case, inside ChimeraX? I am quite new to ChimeraX. I understand this is more fitted to an MD simulation. But I got to know there are options to fit a PDB to a density map. So I wondered if this can be achieved in ChimeraX. Best, Roden -- This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.

3 10

Re: [chimerax-users] Test files for bug report [ChimeraX] #5467: AmiraMesh
by Tom Goddard 26 Oct '21

26 Oct '21

Hi Roden, These 3 Amira files are vertex/edge/point data, not 3D lattices. The ChimeraX reader only handles 3D lattices Amira files. It does not look like our ChimeraX documentation explains this. I'll try to get this on our docs (3d lattice volume data, float, unsigned 16-bit, uncompressed only). Tom > On Oct 25, 2021, at 12:20 PM, Roden Deng Luo <deng.luo(a)kaust.edu.sa> wrote: > > Dear Tom and Andrea, > > Thanks for the quick responses. Upon the kind approval from Andrea, I attached the .am file I received from Andrea (in the format of 2.0), as well as the other two that are exported from this file (in the format of 3.0, one is in ascii as revealed by the name). > > Best regards, > Roden

2 3

Open AmiraMesh 3.0 in ChimeraX
by Roden Deng Luo 25 Oct '21

25 Oct '21

Dear ChimeraX Users, I have an AmiraMesh .am file exported from Amira 3D 2021.1 (Build date: 2021-06-21 13:21:22, SHA id: 213bd1......13c73e). When I load it into ChimeraX 1.2.5 or ChimeraX 1.3.dev202110231141, ChimeraX tells me the following error. First line of AmiraMesh file must start with "# AmiraMesh BINARY-LITTLE-ENDIAN 2.1", instead got "b'# AmiraMesh BINARY-LITTLE-ENDIAN 3.0\n'" Googling "AmiraMesh site:https://www.rbvi.ucsf.edu/pipermail/chimerax-users" shows no result. Can anyone kindly help here? Many thanks, Roden -- This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.

2 5

problem with displaying secondary structures
by Elżbieta Wątor 24 Oct '21

24 Oct '21

Hi, I am trying to prepare figures for my publications and I have a problem with ss assignment. When I open structure in pymol, everything is assigned correctly. However, when I open the same structure in ChimeraX (1.2.5) I have gaps in helices and also not all of B strands are assigned correctly. I tried "dssp" command, but I probably type something wrong, because everytime I got "expected keyword" reply. Also I tried to do that manually using such commands setattr /B:5-7 res ss_type 1 and for some regions it works and for some not e.g I can change the whole helices with gaps to loop but in other way around it again gives me back helices with gaps. I've just started learning ChimeraX so probably there is some easy explanation, but I would be really grateful for your help. Best regards, Ela Wator

2 1

red-cyan 3D view in chimera X?
by Maya Shmulevitz 22 Oct '21

22 Oct '21

Hi everyone, Does anyone know how to switch to red-cyan for the structures so that my class can see them with 3D red/cyan glasses? I used to do it on the old chimera with the camera feature but cannot find the option in chimera X. Thank you!! -- Maya Shmulevitz Canada Research Chair in Molecular Virology and Oncotherapy Associate Professor University of Alberta Medical Microbiology and Immunology Li Ka Shing Institute for Virology 6-21 HMRC Edmonton, Alberta, T6G 2E1 CANADA

3 3

Running ChimeraX and a REPL
by Tom Mulvaney 21 Oct '21

21 Oct '21

Hi all, I'm wondering if anyone has any experience running ChimeraX with either a standard REPL or IPython REPL? ChimeraX already has a 'shell' tool that allows interacting with ChimeraX through a Python REPL which I've found invaluable for testing out ideas and poking around in ChimeraX in general. It would be really nice though if I could send Python code directly from my IDE to be evaluated. In order to make this work, it would be great if ChimeraX could be run from a terminal and provide a Python (or preferably IPython) REPL. As it stands, I've managed to nearly make this work with the following script: import IPython.terminal.embed IPython.terminal.embed.embed() I then run: ChimeraX --script repl.py After typing, `%gui qt5`, the ChimeraX GUI appears. I can then interact with the REPL directly from the comfort of Emacs and evaluate things - but! - the main 3D view does not end up being displayed. Does anyone know how to get the REPL and 3D stuff to work side-by-side? Kind regards, Tom

3 3

ChimeraX issue
by Amaya Cuesta, Joan 21 Oct '21

21 Oct '21

Dear ChimeraX Team, I'm trying to use ChimeraX on my VM (Ubuntu 20.04.01), but I'm having the error on the screenshot attached below. I tried to update OpenGL to 3.3, and on the terminal it seems that it installed everything but then when I try to open again I'm getting the same issue. I tried to update OpenGL following this: https://www.reddit.com/r/Ubuntu/comments/8tpq05/how_can_update_my_display_d… But always when I do the command: glxinfo | grep "OpenGL version" , it shows: "OpenGL version string: 3.1 Mesa 21.0.3". Not sure why it is not updating to 3.3 while all the other packages are upgraded. Could you please advice? Kind regards Joan Cuesta (BSc) Viral Zoonoses Research Scientist Rabies and Viral Zoonoses Group Animal & Plant Health Agency (APHA) Internal extension: 71528 External: 02087201528 | Email: Joan.Cuesta(a)apha.gov.uk<mailto:Joan.Cuesta@apha.gov.uk> Website: www.gov.uk/apha<http://www.gov.uk/apha> | Twitter: @APHAgovuk<http://www.twitter.com/aphagovuk> | Facebook: aphagov<http://www.facebook.com/aphagov> Address: APHA Weybridge, Woodham Lane, New Haw, Addlestone, Surrey KT15 3NB, UK Working hours - Monday - Friday, 9 - 5:30 pm Department for Environment, Food and Rural Affairs (Defra) This email and any attachments is intended for the named recipient only. If you have received it in error you have no authority to use, disclose, store or copy any of its contents and you should destroy it and inform the sender. Whilst this email and associated attachments will have been checked for known viruses whilst within Defra systems we can accept no responsibility once it has left our systems. Communications on Defra's computer systems may be monitored and/or recorded to secure the effective operation of the system and for other lawful purposes.

4 5